About homing procedure

I need some help. When I press the 'All Home' button, the z axis stops to the upper limit switch and it works fine. But there is also another limit switch which is fitted on the table and EMC have to move the speedle down until the bottom point of the cutter presses this switch to calculate the lenth of the cutter. How can I add this procedure to the homing procedure?

You can't! (As I know)

But if that switch is routed as probe input then you can use G38 move and touch off.
Most user's use Z zerro at part top not at table top.

It is very critical to have an absolute Z zero in down position after putting a tool. I'll try ro explain why. My english not help me very much, but I'll try.:
1. If you have a block which its upper surface isn't flat and you have to make it flat in a specific thickness.
2. If a mat;erial is a little curved or slopped and you have to mill it to make it parallelepipeded.
In both of these cases the "touch off" is unusable.
You need an absolute Z zero position out of material or table area. So I put a switch someware on my machine, out of the x-y table and after homing I move down the spindle until tool press the switch. This is my zero position for Z-axis. The last movement I'd like add it in homing procedure.

You can touchOff to the table itself! Or you can touchoff to the body of machine.

Yes, you ase right. This is what I do with the switch, but I want to do it automaticaly enery time I press "home all" button.

The problem seem's to minior and I'm afraid that nobody want to resolve it.
But EMC is open source and anybody can make improvment's. So you can do it on your own. Just don't tell me that you are not programmer. I'm not programer too and digging into source and try to understand what how why.
Just right time to get new knowledge.